Compact radio frequency transmitting and receiving antenna...

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/22 (2006.01) H01Q 1/00 (2006.01) H01Q 1/38 (2006.01) H01Q 9/40 (2006.01) H01Q 13/10 (2006.01) H02J 13/00 (2006.01) H04B 1/38 (2006.01)

Patent

CA 2245671

A radio frequency antenna for use with a wall-mounted transmitter and/or receiver for receiving and/or transmitting signals adapted to control a control device and/or indicate status of the control device. The antenna includes an insulating substrate sized to fit within an area defined by a faceplate sized to cover an outwardly facing opening of an electrical wallbox. Conductors are disposed on both sides of the substrate forming a capacitive component. At least one of the conductors is adapted to radiate radio frequency energy into the environment. The one conductor is electrically coupled to the other conductor, and the one conductor has a pattern such that the conductor is absent in areas so as to provide the antenna with an inductive component. The at least one conductor further provides a connection to the transmitter and/or receiver. The antenna provides an antenna near-field which is substantially at the edges of the substrate and which provides insubstantial electromagnetic field coupling to an electronic circuit disposed adjacent the antenna connected to the antenna and further provides a radiated field substantially isotropic in the antenna far-field.

L'invention porte sur une antenne RF destinée à être utilisée avec un émetteur et/ou récepteur servant à la réception et/ou à l'émission de signaux de commande d'un dispositif de commande et/ou à en indiquer l'état. Ladite antenne comprend un substrat isolant dimensionné pour s'adapter à une plaque frontale recouvrant une ouverture extérieure pratiquée dans un boîtier électrique mural. Des conducteurs sont disposés de part et d'autre du substrat de manière à constituer un élément capacitif. L'un au moins des conducteurs, conçu pour émettre de l'énergie radioélectrique dans l'environnement, est relié électriquement à l'autre et disposé de façon telle qu'il est absent dans certaines zones de manière à doter l'antenne d'un élément inductif. Ce conducteur, au moins, comporte de plus une liaison avec l'émetteur et/ou récepteur. L'antenne produit un champ proche sensiblement localisé aux bords du substrat assurant un couplage de champ électromagnétique non matériel avec un circuit électronique voisin de l'antenne et lui étant relié de manière à produire un champ de rayonnement sensiblement isotrope à longue distance.

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